Dauphinoise Potatoes

[Staples]

1 onion, thinly sliced

1 clove of garlic, crushed (optional)

15g/½oz butter

900g/2lb old floury potatoes, peeled and thinly sliced

290ml/½ pint double cream

290ml/½ pint milk

salt and freshly ground black pepper

1. Preheat oven to 170°C/325°F/Gas mark 3.

2. Cook onions and garlic, if using, in butter until soft but not brown.

3. Layer up the potatoes and creams with the onions and seasoning in a lightly buttered dish and bake in the oven for 1½ hours or until tender.